Publisher Summary This chapter discusses the symptoms of swelling in axilla. Swelling in the axilla in the great majority of cases is as a result of enlargement of the lymphatic nodes. If the enlargement is inflammatory, a subsequent abscess, either acute or chronic, is frequent. Any form of tumor other than a nodular one is distinctly rare, but unfortunately, it is common to find the node the seat of metastases from carcinoma of the breast. Acute abscess may be recognized at once by the well-marked signs of local inflammation and the general febrile disturbance. There is one form of acute abscess that may not be obvious, that is, one situated in the upper part of the axilla and covered by the pectoral muscles. On account of its distance from the surface, the local signs of inflammation may not be great though the general signs are marked. There will be great disinclination to move the arm on account of pain, and there is usually some cause, such as a whitlow on the finger, to account for the trouble.